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East Wall 2420/45° <br />N <br />E <br />S <br />Equal Area <br />Lower Hemisphere <br />Friction Angle 33° <br />Expanation: <br />------ Trend and Plunge of Plane Intersection <br />Wall Orientation <br />Planes of Discontinuity Sets <br />Variation in Dip of Foliation F-1 <br />Friction Angle <br />Daylight Envelope <br />Note: There is a potential for instability <br />when intersection of great circles representing <br />planes fall within the shaded region. <br />LACHEL "DICE <br />& Associates <br />G ntn nts, F-dat-, a rdex9..d SCut-, <br />Stereonet Plot: East Wall <br />LAFARGE I Figure 10 <br />NORTH AMERICA